- Table TT-1 to Subpart TT of Part 98—Default DOC and Decay Rate Values for Industrial Waste Landfills
| Industry/Waste Type | DOC
(weight fraction, wet basis) | k
[dry climate a] (yr | k
[moderate climate a] (yr | k
[wet climate a] (yr | Food Processing (other than industrial sludge) | 0.22 | 0.06 | 0.12 | 0.18 | Pulp and Paper Industry: | Pulp and paper wastes segregated into separate streams: | Boiler Ash | 0.06 | 0.02 | 0.03 | 0.04 | Wastewater Sludge | 0.12 | 0.02 | 0.04 | 0.06 | Kraft Recovery Wastes b | 0.025 | 0.02 | 0.03 | 0.04 | Other Pulp and Paper Wastes (not otherwise listed) | 0.20 | 0.02 | 0.03 | 0.04 | Pulp and paper wastes not segregated into separate streams: | Pulp and paper manufacturing wastes, general (other than industrial sludge) | 0.15 | 0.02 | 0.03 | 0.04 | Wood and Wood Product (other than industrial sludge) | 0.43 | 0.02 | 0.03 | 0.04 | Construction and Demolition | 0.08 | 0.02 | 0.03 | 0.04 | Industrial Sludge c | 0.09 | 0.02 | 0.04 | 0.06 | Inert Waste [ | 0 | 0 | 0 | 0 | Other Industrial Solid Waste (not otherwise listed) | 0.20 | 0.02 | 0.04 | 0.06 |
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a The applicable climate classification is determined based on the annual rainfall plus the recirculated leachate application rate. Recirculated leachate application rate (in inches/year) is the total volume of leachate recirculated from company records or engineering estimates and applied to the landfill divided by the area of the portion of the landfill containing waste [with appropriate unit conversions].
Dry climate = precipitation plus recirculated leachate less than 20 inches/year;
Moderate climate = precipitation plus recirculated leachate from 20 to 40 inches/year (inclusive);
Wet climate = precipitation plus recirculated leachate greater than 40 inches/year.
Alternatively, landfills that use leachate recirculation can elect to use the k value for wet climate rather than calculating the recirculated leachate rate.
b Kraft Recovery Wastes include green liquor dregs, slaker grits, and lime mud, which may also be referred to collectively as causticizing or recausticizing wastes.
c A facility that can segregate out pulp and paper industry wastewater sludge must apply the 0.12 DOC value to that portion of the sludge.